BigBang is a block system on the peer-to-peer network. Similar to the popular peer-to-peer digital currency, the transparent ledger is maintained in a decentralized way, and then achieve autonomous secure management and efficient flow of digital assets. BigBang is designed for the data requirements of the IoT (Internet of Things). BigBang uses blockchain technology to provide decentralized security management platform, and achieve the performance requirement such as high concurrency and low latency for IoT systems.